Core Web Vitals Calculator

Enter your LCP, INP, and CLS values to get a real-time Core Web Vitals assessment with prioritized fixes for each metric.

✗ Failing Core Web Vitals

0 of 3 metrics in the "Good" range. Google requires all three to pass.

LCP

Largest Contentful Paint

Needs Improvement
2.8s/ good ≤ 2.5s
  • Optimize and preload the hero image (WebP/AVIF)
  • Reduce server response time (TTFB) with caching/CDN

INP

Interaction to Next Paint

Needs Improvement
240ms/ good ≤ 200ms
  • Break up long JavaScript tasks (>50ms)
  • Defer non-critical third-party scripts

CLS

Cumulative Layout Shift

Needs Improvement
0.14/ good ≤ 0.1
  • Set explicit width/height on images and video
  • Reserve space for ads and embeds

Thresholds per Google's web.dev (2024+): INP replaced FID as a Core Web Vital in March 2024.